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Valve actuator automatic control method

A valve actuator and automatic control system technology, applied in the direction of valve details, valve devices, engine components, etc., can solve the problems of constant valve opening/closing speed, valve not opening, valve seat dynamic load overload, etc., to achieve The effect of improving position control accuracy and stabilizing valve operation speed

Active Publication Date: 2020-12-22
BEIJING RAYMOND CBE MECHANICAL & ELECTRIC TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For this reason, the embodiment of the present invention provides an automatic control method for valve actuators to at least solve the problems in the prior art that the rotation speed of the three-phase AC asynchronous motor is fixed during the operation of the valve, the valve opening / closing speed is constant, and the valve closing reaches The dynamic load of the valve seat is overloaded at the dead point, resulting in the problem that the valve cannot be opened after it is tightly closed

Method used

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Embodiment Construction

[0051] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0052] Such as figure 1 As shown, the embodiment of the present invention provides an automatic control method for a valve actuator, which is applied to an automatic control system for a valve actuator. The control system includes: a control module; an AC inverter connected to the control module; an AC inverter connected to the A three-phase AC asynchronous motor; a transmission device connected to the three-phase AC asynchronous m...

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Abstract

The invention provides a valve actuator automatic control method which is applied to a valve actuator automatic control system. The control system comprises a control module; an alternating-current frequency converter connected with the control module; a three-phase alternating-current asynchronous motor connected with the alternating-current frequency converter; a transmission device connected with the three-phase alternating-current asynchronous motor; and a valve connected with the transmission device. The method comprises the steps that position and speed signals of the valve are obtained;the position and speed signals are treated to obtain a target signal; and opening / closing of the valve is controlled according to the target signal. Meanwhile, the embodiment of the valve actuator automatic control method has the characteristics that full-stroke continuous monitoring of the valve position can be realized by adopting a rotary transformer, and the position control precision is improved.

Description

technical field [0001] The invention relates to the technical field of valve actuators, in particular to an automatic control method for valve actuators. Background technique [0002] At present, there are a large number of valve electric devices that use a three-phase power supply to directly start a three-phase AC asynchronous motor, and the motor drives a mechanical transmission mechanism to drive the valve to operate to realize valve opening / closing. Three-phase AC asynchronous motors are widely used in electric devices due to their advantages of simple structure, reliable operation, light weight, low price and large starting torque, but various problems occur during use, which are summarized as follows: [0003] Problem 1. The speed of the three-phase AC asynchronous motor is fixed during the operation of the valve, and the valve opening / closing speed remains unchanged. When the valve closes to the dead point, the dynamic load of the valve seat is overloaded, resulting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/04F16K37/00F16K47/02
CPCF16K31/04F16K37/0025F16K37/0041F16K47/02
Inventor 周文赵战国朱涛
Owner BEIJING RAYMOND CBE MECHANICAL & ELECTRIC TECH
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